Transport von Wärme

Bošnjaković, F.; El-Dessouky, M.; Fritz, W.; Gumz, Wilhelm; Hensel, F.; Krischer, O.; Kuster, W. C.; Kux, C.; Martinengo, A.; Riedel, L.; Ruhl, E.; Thomas, W.; Tödheide, K.; Troe, J.; Vasatko, H.; Wagner, H. G.-G.; Westphely, H.; Wirth, H.; Hausen, Helmuth

doi:10.1007/978-3-662-43298-3_2

Cited by 1 publication

(1 citation statement)

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“…Heat capacity and thermal conductivity of our sample consisting of 95% water and 5% ethanol were treated as temperature independent, since temperature changes within the liquid are well below 20 K for a base temperature ∼280 K. For glass and nitrogen these properties were modeled as functions of temperature due to the high thermal gradients expected within these materials. All values are defined as published in the [9,10].…”

Section: Simulationmentioning

confidence: 99%

A setup for fast cooling of liquids in sealed containers

et al. 2018

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We present a simple layout of a fast cooling system for liquids in sealed containers utilizing the large temperature gradients of cold nitrogen gas. Our system is optimized for about 20 cylindrical containers of 500 cm 3 , but the setup allows for simple up-and down-scaling as well as the use of arbitrary containers. We have characterized the cooling performance of our system experimentally for temperatures of the liquid in the range from room temperature down to the freezing point at ≈−2 ºC. With our system we achieve container cooling times as low as 3 min, a significant reduction if compared to cooling times with common methods in the range of 8 to 40 min. Modeling of the cooling process proves that convection within the liquid is crucial for quick heat transfer. For the cases studied here, the most important factor limiting the cooling rate is the thermal conductivity of the container material.

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Section: Simulationmentioning

confidence: 99%